WMLScript:
WMLScript Stand for(Wireless Markup Language Script) is the part
of WML. It is a client-side scripting language that is very similar to
JavaScript.
it has some diffrences with javascript.WMLScript (Wireless Markup
Language Script) is the client-side scripting language of WML (Wireless Markup
Language). A scripting language is similar to a programming language, but is of
lighter weight. With WMLScript,
the wireless device can do some of the processing and computation.WMLScript
mostly uses in j2me .
Syntax of WMLScript:
WMLScript is case-sensitive.
The smallest unit of execution in WMLScript is a statement and each statement
must end with a semicolon (;).
Comments can either be single-line (beginning with //) or multi-line (bracketed
by /* and */). This syntax is identical to both C++ and Java.
A literal character string is defined as any sequence of zero or more characters
enclosed within double ("") or single (‘) quotes.
Boolean literal values correspond to true and false.(same other languages)
New variables are declared using the var keyword (i.e. var x;)
WML Script Operators:
WML Script supports following type of operators these are:
Comparison Operators
Logical (or Relational) Operators
Assignment Operators
Arithmetic Operators
Conditional (or ternary) Operators
Check for complete detail of The WML Operators.
WML Script flow Control Statements:
Control statements are used for controlling the sequence and iterations in a
program.
while Making variable iteration loop
break Terminates a loop
Statement Description
if-else Conditional branching
for Making self-incremented fixed iteration loop
continue Quit the current iteration of a loop
Difference between WMLScript and JavaScript,Some diffrences are:
| WMLScript | JavaScript |
| WMLScript is used with the WML pages,. | whereas JavaScript is used with the HTML pages and it is not compatible with WML. |
| WMLScript comes under WML only. | whereas JavaScript is the part of the WAP or Wireless Application Protocol, |
| WMLScript is used for the client side scripting and it is not different from JavaScript, | whereas JavaScript is used for performing tasks like user input validations and generating of error messages. |
| WMLScript uses the ECMAScript but it is not compatible with the JavaScript, | whereas JavaScript is fully compatible
with the HTML. |
| WMLScript code is written in a file and is placed in the document, | whereas JavaScript code is embedded in HTML language |
Example:the hello world example:
|
<?xml version="1.0"?> <!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.3//EN" "http://www.wapforum.org/DTD/wml1.3.dtd"> <wml> <card id="card1" title="WMLScript "> <p> <a href="helloWorldEg1.wmls#helloWorld()">Run WMLScript</a><br/> $(message) </p> </card> </wml> extern function helloWorld() { WMLBrowser.setVar("message", "Hello World."); WMLBrowser.refresh(); } |